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It is anticipated that surface runoff in intermittent drainage channels will have little effect on underground workings. Experience gained in oper- ating this mine has shown that the only noticeable effect between surface runoff and underground workings occurs when a fracture system is encountered. When underground workings encounter such a system, the water contained therein creates difficult mining conditions. However, these conditions tend to dry in about two weeks. It should be noted that little or no alluvium is present in the intermittent channels of this area. WSC has not observed significant in- flows of water on a seasonal basis elsewhere on the mining property. Compar- isons of water quality from two drill holes were made to estimate effect upon the water quality from mixing of waters from above and below the coal seams. The results illustrate groundwater quality in the immediate vicinity of where mine wastes would be placed. Samples were taken from the No. 1 drill hole and from seep water from above the coal seam, and subsequent comparison with water • from No. 5 drill hole, which included water from all lower seams (Figure II.A.I). These analyses are listed in Table III.C-2. Sampling was done 15 June 1979. From the values in Table III.C-2 it can be assumed that the two waters were very similar and, therefore, mixing of these two waters would cause no appreciable harm. The most significant difference was in suspended solids, 72 mg/1 for No. 1 drill hole and 1,110 mg/1 for No. 5. This is probably be- cause the sample from drill hole No. 5 was standing water in an open drill hole, whereas the No. 1 sample was water which had been seeping through rock and had most of the suspended solids filtered out. Further hydrologic studies are anticipated for the permit area. These studies will continue to monitor ground and surface water characteristics relevant to the permit area and mining operations. • 35